/*
 *  Copyright (c) 2017 Tran Le Duy
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.duy.pascal.interperter.libraries.android.gesture.listener;

import android.view.ScaleGestureDetector;

import com.duy.pascal.interperter.libraries.android.gesture.model.BaseGestureEvent;

import java.util.Queue;

public class ScaleListener extends ScaleGestureDetector.SimpleOnScaleGestureListener {
    private float mScaleFactor = .4f;

    public ScaleListener(Queue<BaseGestureEvent> gestureEventQueue) {
    }

    @Override
    public boolean onScale(ScaleGestureDetector detector) {
        mScaleFactor *= detector.getScaleFactor(); // scale change since previous event

        // Don't let the object get too small or too large.
        mScaleFactor = Math.max(0.1f, Math.min(mScaleFactor, 10.0f));

        return true;
    }

    public float getScaleFactor() {
        return mScaleFactor;
    }
}

